| Nikephoros Diogenes | |
|---|---|
| Emperor of the Romans | |
| Byzantine co-emperor | |
| Reign | c. 1069 – November 1071 |
| Senior emperor | Romanos IV Diogenes |
| Co-emperors | Leo (1070–1071) Michael VII (1071–1078) Konstantios (1060–1078) Andronikos (1068–1070s) |
| Born | c. 1069 |
| Died | After 1094 |
| Father | Romanos IV Diogenes |
| Mother | Eudokia Makrembolitissa |
Nikephoros Diogenes (Greek: Νικηφόρος Διογένης), Latinized as Nicephorus Diogenes, was presumably a junior Byzantine emperor around 1069–1071. He was born c. 1069 to Emperor Romanos IV Diogenes and Empress Eudokia Makrembolitissa. He was elevated to junior emperor in 1070, although he lost this position when his father was overthrown in 1071. Emperor Alexios I Komnenos, after overthrowing Nikephoros III, made Nikephoros doux of Crete, and made him a general. Nikephoros conspired against him in 1094, involving numerous confidants and relatives of Alexios, including Alexios' brother, Adrianos. For this conspiracy, he was blinded, in accordance with Byzantine traditions. After this, he retired to his estates, and spent the last years of his life studying classical literature.